Explanation

Jewish tribe Banu Nadir expelled from Madina in Rabi’ al-awwal, 4 Hijri. 

Banu Nadir tribe were Jewish tribes who lived in Medina and were the Prophet allies.

Then the battle of Banu Nadir occurred. Prophet sieged Banu Nadir with an army under the commandership of ‘Ali b. Abi Talib. During the siege.